This data was collected as part of an effort to map beach topography
efficiently and cheaply.

Notes

Interferometric Synthetic Aperture Radar (IfSAR) data has been
collected for the coastal counties Santa Barbara, Ventura, Los Angeles,
Orange, and San Diego with parts of San Bernardino and Riverside counties
(approximately 40,000 sq. km. total). This data is first surface return
(vegetation is in the dataset) X-band IfSAR with three meter point
spacing and approximately one-meter vertical accuracy in non-vegetated
areas. Products include a digital elevation model (DEM), an
orthorectified radar reflectance image, and a height variance map. The
DEM and height variance products are provided in floating point raster
format with an ESRI header file. The reflectance image is a geotiff.